Research the causes of related medical symptoms such as: 1  Eye. 2  Eye symptoms (5412 causes) 3  Eye disease. 4  Eye disorder. 5  Eye problem (5412 causes) 6  Eye pain (475 causes) 7  Itch (1068 causes) 8  more symptoms...Â».
How to read the Histogram. A histogram is a graphical representation of the pixels exposed in your image. The left side of the graph represents the blacks or shadows, the right side represents the highlights or bright areas and the middle section is mid-tones (middle or 18% grey).
There are two peaks on the histogram: blue-positive (right) and blue-negative (left) peak. The left peak is bigger than right peak, so we can conclude that there is more blue-negative cells, than blue-positive cells in the sample. 2. It is important to remember, that histogram shows only one parameter.